Site-Selective Intermolecular Oxidative C-3 Alkenylation of 7-Azaindoles at Room Temperature
作者:Prakash Kannaboina、K. Anil Kumar、Parthasarathi Das
DOI:10.1021/acs.orglett.5b03429
日期:2016.3.4
palladium-catalyzed C-3 selective alkenylation of 7-azaindoles, performed in the presence of Pd(OAc)2 as the catalyst, PPh3 as the ligand, Cu(OTf)2 as an oxidative cocatalyst, and molecular oxygen (O2) as the terminal oxidant at room temperature, has been reported. This direct alkenylation strategy offers a new approach in functionalizing pharmaceutically important 7-azaindoles.
Cu(II)-catalyzed sulfonylation of 7-azaindoles using DABSO as SO2-Source and its mechanistic study
作者:Urvashi、Mohammad Ovais Dar、Prasad V. Bharatam、Parthasarathi Das、Shrikant Kukreti、Vibha Tandon
DOI:10.1016/j.tet.2020.131337
日期:2020.7
Suzuki-Miyaura cross coupling (SMC) reaction under mild conditions giving good yields of sulfonylated 7-azaindole derivatives. Interestingly, control experiments suggest that present method involves in-situ generation of ArSO2 free radical followed by the key steps of SMC reaction. Scope of the reaction was explored with both electronically different and bulkygroup carrying boronic acids as coupling partner.
Palladium-catalyzed aminocarbonylation of halo-substituted 7-azaindoles and other heteroarenes using chloroform as a carbon monoxide source
作者:Prakash Kannaboina、Gaurav Raina、K. Anil Kumar、Parthasarathi Das
DOI:10.1039/c7cc04339b
日期:——
A palladium-catalyzed aminocarbonylation of halo-substituted 7-azaindoles utilizing CHCl3 as the carbonyl source has been developed for the straightforward incorporation of an amide functional group. The protocol was extended to other heteroarenes such as pyrazolopyridines and indazoles. The substrate scope of the reaction with respect to heteroarenes and the amine component is reported. This method
We studied [3 + 2] cycloaddition reactions of indoles and azaindoles with various nitrileoxides. N-Protection of indoles and azaindoles with the 4-methoxybenzyl group was found to be effective for [3 + 2] cycloaddition with nitrileoxides. Due to the propensity of the nitrileoxides to dimerize, it was necessary to optimize reaction conditions in the case of unstable nitrileoxides. This method was
Structure Based Design of <i>N</i>-(3-((1<i>H</i>-Pyrazolo[3,4-<i>b</i>]pyridin-5-yl)ethynyl)benzenesulfonamides as Selective Leucine-Zipper and Sterile-α Motif Kinase (ZAK) Inhibitors
A series of N-(3-((1H-pyrazolo[3,4-b]pyridin-5-yl)ethynyl)bentenesulfonamides were designed as the first class of highly selective ZAK inhibitors. The representative compound 3h strongly inhibits the kinase activity of ZAK with an IC50 of 3.3 nM and dose-dependently suppresses the activation of ZAK downstream signals in vitro and in vivo, while it is significantly less potent for the majority of 403 nonmutated kinases evaluated. Compound 3h also exhibits orally therapeutic effects on cardiac hypertrophy in a spontaneous hypertensive rat model.